The modern definition of a "blue moon" has nothing to do with its color.
People often do what their neighbors do. A firm decided to get more people to sign up for retirement plans by telling employees how many of their coworkers had signed up. We examine happened next.
The judge wrote that someday they may get legal rights, but courts don't embrace change quickly. The chimps are held by Stony Brook University.
A group of Ugandan chimps has found a great way to boost their mineral intake and neutralize bitter compounds in their diet: by eating clay.
Royal Dutch Shell has announced plans to eliminate 6,500 jobs as slumping oil prices force the industry to make adjustments. Shell's profits fell by more than 30 percent in the second quarter.
NPR's Melissa Block speaks with the AP's Brazil bureau chief Brad Brooks about the investigation, which found high levels of dangerous viruses in water venues for the 2016 Summer Olympics.
Investigators believe a piece of debris found on the French island of Réunion in the Indian Ocean could be from Malaysia Airlines Flight 370, which disappeared in March 2014.
An scientist who studies ocean circulation patterns tells NPR that it's "highly likely" that floating wreckage from the airliner could have reached the island of Reunion near Madagascar.
The chytrid fungus has wiped out populations of amphibians around the world. A type of the fungus infects only salamanders, and researchers have identified vulnerable areas in North America.
The stethoscope seems so simple — a 19th century tool for listening more closely to the human heart or lungs. It also sparked a culture of listening that is transforming the way scientists learn.
Google's already tested three of the pollution-sensor equipped cars in Denver, and is currently trying them out in the Bay Area.
SpaceShipTwo broke apart soon after it reached supersonic speeds and an altitude of around 50,000 feet. Its pilot says his parachute opened in a "gentlemanly" fashion, after he had fallen for a while.
Scientists say lake herring, a key fish in Lake Superior's food web, is suffering because of mild winters and Europe's appetite for roe. Some say the species may be at risk of "collapse."
NPR's Melissa Block speaks with KUCB reporter John Ryan about how protesters are trying to block Shell's plan to drill in the Arctic by keeping a Shell icebreaker from leaving Portland, Ore.
Cecil the lion died in an apparently illegal hunt in Zimbabwe. But legal trophy hunting can bring in big bucks for Africa nations. Our interviewee thinks tourism is a far more profitable venture.
Teleporting from one place to the next looks so fun on the big and little screen. But physicists who actually can do something like that with single atoms say teleporting people would be much messier.
Already, researcher Stuart Russell says, sentry robots in South Korea "can spot and track a human being for a distance of two miles – and can very accurately kill that person."
The more than 3,000-acre fire in Glacier National Park in Montana is forcing evacuations and road closures. The fire comes at peak tourist season for park area businesses.
Two professors at the University of Lisbon say they have discovered why the pendulums of clocks set on the same surface will eventually swing together in opposing directions.
SpaceShipTwo broke apart during an October test flight because the co-pilot unlocked a section of the spaceship's tail too early, the National Transportation and Safety Board announced.